T(n,k)=Number of nXk 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

A201451

T(n,k)=Number of nXk 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

Terms

    a(0) =4a(1) =6a(2) =6a(3) =4a(4) =2a(5) =4a(6) =1a(7) =21a(8) =21a(9) =1a(10) =4a(11) =9a(12) =52a(13) =9a(14) =4a(15) =6a(16) =56a(17) =29a(18) =29a(19) =56a(20) =6a(21) =4a(22) =13a(23) =246a(24) =112a(25) =246a(26) =13a(27) =4a(28) =1a(29) =110

External references